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Easy Redis Java client and Real-Time Data Platform. Valkey compatible. Sync/Async/RxJava3/Reactive API. Client side caching. Over 50 Redis based Java objects and services: JCache API, Apache Tomcat, Hibernate, Spring, Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Scheduler, RPC
/*
* Copyright (c) 2016-present, RxJava Contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is
* distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
* the License for the specific language governing permissions and limitations under the License.
*/
package io.reactivex.rxjava3.internal.operators.observable;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.*;
import io.reactivex.rxjava3.core.*;
import io.reactivex.rxjava3.disposables.Disposable;
import io.reactivex.rxjava3.exceptions.Exceptions;
import io.reactivex.rxjava3.functions.Consumer;
import io.reactivex.rxjava3.internal.disposables.DisposableHelper;
import io.reactivex.rxjava3.observers.SerializedObserver;
public final class ObservableSampleTimed extends AbstractObservableWithUpstream {
final long period;
final TimeUnit unit;
final Scheduler scheduler;
final Consumer super T> onDropped;
final boolean emitLast;
public ObservableSampleTimed(ObservableSource source,
long period,
TimeUnit unit,
Scheduler scheduler,
boolean emitLast,
Consumer super T> onDropped) {
super(source);
this.period = period;
this.unit = unit;
this.scheduler = scheduler;
this.emitLast = emitLast;
this.onDropped = onDropped;
}
@Override
public void subscribeActual(Observer super T> t) {
SerializedObserver serial = new SerializedObserver<>(t);
if (emitLast) {
source.subscribe(new SampleTimedEmitLast<>(serial, period, unit, scheduler, onDropped));
} else {
source.subscribe(new SampleTimedNoLast<>(serial, period, unit, scheduler, onDropped));
}
}
abstract static class SampleTimedObserver extends AtomicReference implements Observer, Disposable, Runnable {
private static final long serialVersionUID = -3517602651313910099L;
final Observer super T> downstream;
final long period;
final TimeUnit unit;
final Scheduler scheduler;
final Consumer super T> onDropped;
final AtomicReference timer = new AtomicReference<>();
Disposable upstream;
SampleTimedObserver(Observer super T> actual, long period, TimeUnit unit, Scheduler scheduler, Consumer super T> onDropped) {
this.downstream = actual;
this.period = period;
this.unit = unit;
this.scheduler = scheduler;
this.onDropped = onDropped;
}
@Override
public void onSubscribe(Disposable d) {
if (DisposableHelper.validate(this.upstream, d)) {
this.upstream = d;
downstream.onSubscribe(this);
Disposable task = scheduler.schedulePeriodicallyDirect(this, period, period, unit);
DisposableHelper.replace(timer, task);
}
}
@Override
public void onNext(T t) {
T oldValue = getAndSet(t);
if (oldValue != null && onDropped != null) {
try {
onDropped.accept(oldValue);
} catch (Throwable throwable) {
Exceptions.throwIfFatal(throwable);
cancelTimer();
upstream.dispose();
downstream.onError(throwable);
}
}
}
@Override
public void onError(Throwable t) {
cancelTimer();
downstream.onError(t);
}
@Override
public void onComplete() {
cancelTimer();
complete();
}
void cancelTimer() {
DisposableHelper.dispose(timer);
}
@Override
public void dispose() {
cancelTimer();
upstream.dispose();
}
@Override
public boolean isDisposed() {
return upstream.isDisposed();
}
void emit() {
T value = getAndSet(null);
if (value != null) {
downstream.onNext(value);
}
}
abstract void complete();
}
static final class SampleTimedNoLast extends SampleTimedObserver {
private static final long serialVersionUID = -7139995637533111443L;
SampleTimedNoLast(Observer super T> actual, long period, TimeUnit unit, Scheduler scheduler, Consumer super T> onDropped) {
super(actual, period, unit, scheduler, onDropped);
}
@Override
void complete() {
downstream.onComplete();
}
@Override
public void run() {
emit();
}
}
static final class SampleTimedEmitLast extends SampleTimedObserver {
private static final long serialVersionUID = -7139995637533111443L;
final AtomicInteger wip;
SampleTimedEmitLast(Observer super T> actual, long period, TimeUnit unit, Scheduler scheduler, Consumer super T> onDropped) {
super(actual, period, unit, scheduler, onDropped);
this.wip = new AtomicInteger(1);
}
@Override
void complete() {
emit();
if (wip.decrementAndGet() == 0) {
downstream.onComplete();
}
}
@Override
public void run() {
if (wip.incrementAndGet() == 2) {
emit();
if (wip.decrementAndGet() == 0) {
downstream.onComplete();
}
}
}
}
}
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